Boundary tag method in context of dynamic memory management, Data Structure & Algorithms

Assignment Help:

Q. How can we free the memory by using Boundary tag method in the context of Dynamic memory management?                                                                                                      

Ans.

Boundary Tag Method to free Memory is described below

To remove the arbitrary block from the free list (to combine it with the newly made free block) without traversing the whole list, the free list should be doubly linked. Thus each and every free block must contain 2 pointers, next and prev to the next and previous free block on the free block. (This is required when combining a newly freed block with a free block which immediately proceeds in the memory). Thus the front of the free block should be accessible from its rear. One way to do this is to introduce a bsize field at the given offset from the last location or address of each free block. This field exhibits the same value as the size filed at the front of the block. This field have the some value as the size field at the front of the block. The figure below shows the structure of free and allocated blocks under this method which is called the boundary tag method.

free block                                         allocated block

2446_boundary tag.png

Each of the contract fields fflag, prev, size, next, bsize next and bflag is shown as occupying a complete word, although in practice they can be packed together, several fields to a word. We assume that fflag or bflag are logically flags and that true signifies an allocated block and false indicates a free block. Using the information in the free block and the newly freed block, the system merges the two blocks into a bigger hole.


Related Discussions:- Boundary tag method in context of dynamic memory management

Boundary tag method in context of dynamic memory management, Q. How can we ...

Q. How can we free the memory by using Boundary tag method in the context of Dynamic memory management?

space, What is Space complexity of an algorithm? Explain

What is Space complexity of an algorithm? Explain.

Dgsd, Ask question #sdgsdgsdginimum 100 words accepted#

Ask question #sdgsdgsdginimum 100 words accepted#

LINKED LIST, HOW LINKED LIST HEADER WORKS? HOW TO INSERT AND DELETE ELEMENT...

HOW LINKED LIST HEADER WORKS? HOW TO INSERT AND DELETE ELEMENTS IN LINKED LIST?

Direct file organisation, It offers an effective way to organize data while...

It offers an effective way to organize data while there is a requirement to access individual records directly. To access a record directly (or random access) a relationship is

C++ function, Write c++ function to traverse the threaded binary tree in in...

Write c++ function to traverse the threaded binary tree in inorder traversal

Explain divide and conquer algorithms, Explain divide and conquer algorithm...

Explain divide and conquer algorithms  Divide  and  conquer  is  probably  the  best  known  general  algorithm  design  method.  It   work according to the following general p

Stack, Explain in detail the algorithmic implementation of multiple stacks....

Explain in detail the algorithmic implementation of multiple stacks.

Stack, implement multiple stacks ina single dimensional array. write algori...

implement multiple stacks ina single dimensional array. write algorithams for various stack operation for them.

Explain graph traversal, Graph Traversal In many problems we wish to in...

Graph Traversal In many problems we wish to investigate all the vertices in a graph in some systematic order. In graph we often do not have any single vertex singled out as spe

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd